Entransy decrease principle of heat transfer in an isolated system

The entropy increase principle for an isolated system and the criteria of thermal equilibrium for an isolated system and systems with prescribed temperature and volume can be derived on the basis of the concept of entropy and the first and second laws of thermodynamics. In this paper, the entransy decrease principle for an isolated system is introduced on the basis of the concept of entransy. It is found that the entransy of an isolated system always decreases during heat transfer. This principle can be taken as an expression of the second law of thermodynamics for heat transfer. The thermal equilibrium criteria for an isolated system and a closed system are also introduced. It is found that when an isolated system reaches thermal equilibrium, its entransy is a minimum value. This criterion is referred to as the minimum entransy principle. When a closed system reaches thermal equilibrium, its free entransy is also a minimum value. This criterion is referred to as the minimum free entransy principle. Therefore, like entropy, entransy can be considered an arrow of time in heat transfer and used to describe the thermal equilibrium state.

[1]  A. Bejan.  A Study of Entropy Generation in Fundamental Convective Heat Transfer , 1979 .

[2]  Fengrui Sun,et al.  Constructal entransy dissipation minimization for 'volume-point' heat conduction , 2008 .

[3]  Zhen-Xiang Gong,et al.  Entropy Generation Minimization , 1996 .

[4]  Fengrui Sun,et al.  “Volume-Point” heat conduction constructal optimization with entransy dissipation minimization objective based on rectangular element , 2008 .

[5]  Lars Onsager,et al.  Fluctuations and Irreversible Processes , 1953 .

[6]  A. Bejan,et al.  Fin Geometry for Minimum Entropy Generation in Forced Convection , 1982 .

[7]  Qun Chen,et al.  Generalized thermal resistance for convective heat transfer and its relation to entransy dissipation , 2008 .

[8]  POTENTIAL CAPACITY DISSIPATION EXTREMUM AND ENTROPY GENERATION MINIMIZATION IN LAMINAR CONVECTIVE HEAT TRANSFER , 2006 .

[9]  XinGang Liang,et al.  Entransy—A physical quantity describing heat transfer ability , 2007 .

[10]  W. Luder.  Introduction to thermodynamics of irreversible processes , 1955 .

[11]  Ibrahim Dincer,et al.  An approach to entropy analysis of a latent heat storage module , 2008 .

[12]  Zeng-Yuan Guo,et al.  Entropy generation extremum and entransy dissipation extremum for heat exchanger optimization , 2009 .

[13]  A. Bejan,et al.  Entropy Generation Through Heat and Fluid Flow , 1983 .

[14]  XueTao Cheng,et al.  Entransy flux of thermal radiation and its application to enclosures with opaque surfaces , 2011 .

[15]  Fengrui Sun,et al.  Optimization for entransy dissipation minimization in heat exchanger , 2009 .

[16]  Liu Xiong-Bin,et al.  A novel method for heat exchanger analysis , 2009 .

[17]  Xinguang Cheng,et al.  Least dissipation principle of heat transport potential capacity and its application in heat conduction optimization , 2003 .

[18]  Ramesh K. Shah,et al.  Entropy generation extrema and their relationship with heat exchanger effectiveness: Number of transfer unit behavior for complex flow arrangements , 2004 .

[19]  Bingjiang Zhang,et al.  An equation of entransy transfer and its application , 2009 .

[20]  Guo Zengyuan,et al.  Physical Mechanism of Heat Conduction Ability Dissipation and Its Analytical Expression , 2007 .

[21]  Adrian Bejan,et al.  Second-Law Analysis in Heat Transfer and Thermal Design , 1982 .

[22]  XueTao Cheng,et al.  Homogenization of temperature field and temperature gradient field , 2009 .

[23]  XinGang Liang,et al.  Application of entransy dissipation extremum principle in radiative heat transfer optimization , 2008 .

[24]  L. Onsager.  Reciprocal Relations in Irreversible Processes. II. , 1931 .